Grundfos SP Series Installation And Operating Instructions Manual page 10

DANGER
Electric shock
Death or serious personal injury
- The pump must be earthed.
- The pump must be connected to an external main
switch with a minimum contact gap of 3 mm in all
poles.
The electrical connection must be carried out by an
authorised person in accordance with local
regulations.
10
The supply voltage, rated maximum current and cos φ appear
from the loose dataseparate name
close to the installation site.
The required voltage quality for MS and MMS motors, measured
at the motor terminals, is - 10 %/+ 6 % of the nominal voltage
during continuous operation (including variation in the supply
voltage and losses in cables).
Check also that there is voltage symmetry in the power supply
lines, i.e. same difference of voltage between the individual
phases. See section 11. Checking motor and
If MS motors with a built-in temperature transmitter (Tempcon)
are not installed together with an
motor protection unit, they must be connected to a 0.47 μF
capacitor approved for phase-phase operation (IEC 384-14) to
meet the EC EMC directive (2004/108/EC). The capacitor must
be connected to the two phases to which the temperature
transmitter is connected. See fig. 10.
Fig. 10 Connection of capacitor
Colours of the
LeadConductor Flat cable
1 = L1 Brown
2 = L2 Black
3 = L3 Grey
4 = PE Yellow and green
The motors are wound for direct-on-line starting or star-delta
starting, and the starting current is between four and six times the
rated current of the motor.
The run-up time of the pump is only about 0.1 second.
Direct-on-line starting is therefore normally approved by the
power supply company.
plate which must be fitted
cable, item 2.
MP 204 or similar Grundfos
leads conductors
Single
leadsconductors
Black
Yellow
Red
Green